Physics – Atomic Physics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9226029p&link_type=abstract
Status Report, period ending 30 Sep. 1991 Harvard Coll. Observatory, Cambridge, MA.
Physics
Atomic Physics
Atomic Physics, Chromosphere, Solar Atmosphere, Solar Corona, Solar Physics, Solar Radiation, Solar Wind, Stellar Models, Ultraviolet Radiation, Apollo Telescope Mount, Electron Impact, Electron Transitions, Electron-Ion Recombination, Research And Development, Rocket-Borne Instruments, Soho Mission, Solar Maximum Mission, Solar Observatories, Spectrographs, Transition Probabilities
Scientific paper
The research activity comprised the measurement of basic atomic processes and parameters which relate directly to the interpretation of solar ultraviolet observations and to the development of comprehensive models of the component structures of the solar atmosphere. The research was specifically directed towards providing the relevant atomic data needed to perform and to improve solar diagnostic techniques which probe active and quiet portions of the solar chromosphere, the transition zone, the inner corona, and the solar wind acceleration regions of the extended corona. The accuracy with which the physical conditions in these structures can be determined depends directly on the accuracy and completeness of the atomic and molecular data. These laboratory data are used to support the analysis programs of past and current solar observations (e.g., the Orbiting solar Observatories, the Solar Maximum Mission, the Skylab Apollo Telescope Mount, and the Naval Research Laboratory's rocket-borne High Resolution Telescope and Spectrograph). In addition, we attempted to anticipate the needs of future space-borne solar studies such as from the joint ESA/NASA Solar and Heliospheric Observatory (SOHO) spacecraft. Our laboratory activities stressed two categories of study: (1) the measurement of absolute rate coefficients for dielectronic recombination and electron impact excitation; and (2) the measurement of atomic transition probabilities for solar density diagnostics. A brief summary of the research activity is provided.
Gardner Larry D.
Kohl John L.
Parkinson William H.
Raymond John C.
Smith Paul L.
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